Hydrogen And Water Flashcards
Metals react similarly to both
Dilute hydrochloric acid and dilute sulphuric acid
Magnesium reacts to dilute HCl with…
Rapid fizzing, the mixture gets very hot, colourless magnesium sulphate / chloride solution forms
Aluminium reacts with dilute HCL…
Slowly due to a coat of aluminium oxide. On heating this layer is removed and the aluminium fizzes a little like Mg
Zinc reacts with dilute HCl…
Slowly with cold dilute acid and may produce some effervescence. However it fizzes more on heating
Iron reacts with dilute HCl…
Slowly with cold dilute acid and will produce a bit of effervescence when heated
When hydrogen combusts
Bonds are broken in the hydrogen and oxygen molecules, which form new bonds if water molecules
The combustion of hydrogen is…
Exothermic and gives out water in the form of steam before it condenses into a liquid
The equation for the combustion of hydrogen is…
2H2(g) + O2(g) = 2H2O(l)
You test for water by…
Water turns anhydrous copper (II) sulphate blue
Turns cobalt chloride paper pink
Equation for water reacting which anhydrous copper sulphate
CuSO4(s) + 5H2O(l) = CuSO4•5H2O
You can check the purity of water by…
Checking it boils and freezes at the correct temperatures